Lactic Acid Bacteria Calcium-Alginate Beads for Freeze-Drying Viability

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Solution Overview

Problem

Existing methods for producing lactic acid bacteria encapsulated in calcium-alginate beads face challenges in achieving high production yield and maintaining survival rates during freeze-drying due to instability and sensitivity to environmental factors.

Innovation Solution

A method involving the use of specific compositions for alginate and calcium-containing solutions, including sucrose, sorbitol, soy peptone, trehalose, and maltodextrin, to form calcium-alginate beads that encapsulate lactic acid bacteria, followed by freeze-drying, which enhances production yield and survival rate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If lactic acid bacteria are processed in powder form using freeze-drying or spray-drying methods, then storage and distribution are improved, but the viability of the bacteria is reduced due to sensitivity to environmental factors and low temperature

Engineering Contradiction:

Improvestorage and distribution capabilityVSAvoidviability of lactic acid bacteria

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies this principle by using alginate capsules as a protective shell around lactic acid bacteria. The alginate capsule acts as a flexible barrier that protects the bacteria from harmful environmental factors during storage and processing, while allowing the bacteria to maintain their viability and physiological activities.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent uses composite materials by combining alginate (a polysaccharide) with calcium ions to form calcium-alginate beads. This composite structure provides enhanced protective properties compared to using alginate alone, improving both the mechanical strength and protective function of the encapsulation layer.

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If alginate capsules are produced by spraying into a coagulation solution, then encapsulation is achieved, but the hardening is insufficient from particle surface to inside due to limited calcium ion diffusion time

Engineering Contradiction:

Improveencapsulation processVSAvoidhardening uniformity

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by pre-mixing calcium ions with the alginate solution before spraying. This ensures that calcium ions are uniformly distributed throughout the alginate matrix from the beginning, allowing complete hardening throughout the bead interior rather than just at the surface.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent changes the parameters of the alginate solution by adjusting the concentration of calcium ions and the timing of their addition. By controlling these parameters, the patent achieves uniform hardening throughout the bead while maintaining ease of manufacture through the spraying process.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If conventional alginate encapsulation methods are used, then some protection is achieved, but the production yield of firmly and densely hardened beads is low

Engineering Contradiction:

Improveprotective functionVSAvoidproduction yield of hardened beads

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent uses calcium ions as an intermediary substance that facilitates the hardening process. The calcium ions act as a mediator between the alginate and the hardening mechanism, enabling uniform and complete calcification throughout the bead structure, thereby increasing production yield.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent ensures continuous hardening action by maintaining calcium ions throughout the entire alginate bead structure. This continuous presence of calcium ions ensures that hardening occurs uniformly from surface to interior, maximizing the production yield of firmly hardened beads.

Inventive Principle:

Principle #20Continuity of useful action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The method significantly improves the production yield and survival rate of lactic acid bacteria after freeze-drying, ensuring stability and functionality in gastrointestinal conditions.

Implementation Method 1

adding the mixture to a calcium-containing solution to form calcium-alginate beads

Methodology Applied

Scientific EffectCrosslinking: Chemical Bonding

Implementation Method 2

freeze-drying the lactic acid bacteria encapsulated with the calcium-alginate beads

Methodology Applied

Scientific EffectFreeze-drying: Freeze Drying

Implementation Method 3

frozen, and then dried under reduced pressure

Methodology Applied

Scientific EffectSublimation: Sublimation

Data Source

PatentUS20250257348A1Method for producing lactic acid bacteria entrapped in calcium-alginate beads

Publication Date: 2025.08.14 CJ CHEILJEDANG CORP

AI summary

The present disclosure relates to a method for producing lactic acid bacteria encapsulated with calcium-alginate beads; lactic acid bacteria encapsulated with calcium-alginate beads, which are produced by the method above; a method for improving the production yield of calcium-alginate beads for encapsulating lactic acid bacteria; and a method for improving the survival rate of freeze-dried lactic acid bacteria.